Merge pull request #81 from webp-sh/avif

2025-07-18 13:42:02 +08:00 · 2021-12-12 14:17:09 +08:00 · 2021-12-12 14:17:09 +08:00 · 8b0354fff7
commit 8b0354fff7
parent aa0af31808 7f1c441b6f
23 changed files with 485 additions and 387 deletions
--- a/.dockerignore
+++ b/.dockerignore
@ -0,0 +1,9 @@
+.github/*
+exhaust/*
+pics/*
+remote-raw/*
+scripts/*
+.git/*
+README.md
+LICENSE
+Makefile
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@ -1,6 +1,6 @@
 version: 2
 updates:
-  - package-ecosystem: ""
+  - package-ecosystem: "gomod"
    directory: "/"
    schedule:
      interval: "daily"
--- a/.github/workflows/CI.yaml
+++ b/.github/workflows/CI.yaml
@ -0,0 +1,21 @@
+name: CI
+on:
+  push:
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          submodules: true
+
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.17.3
+
+      - name: run test cases
+        run: sudo apt install libaom-dev && make test && make
+
--- a/12
+++ b/12
@ -1,16 +1,16 @@
-FROM golang:alpine as builder
+FROM golang:1.17.4-alpine as builder

 ARG IMG_PATH=/opt/pics
 ARG EXHAUST_PATH=/opt/exhaust
-RUN apk update && apk add alpine-sdk && mkdir /build
+RUN apk update && apk add alpine-sdk aom-dev && mkdir /build
 COPY go.mod /build
 RUN cd /build && go mod download

 COPY . /build
-RUN cd /build && sed -i "s|.\/pics|${IMG_PATH}|g" config.json \
-&& sed -i "s|\"\"|\"${EXHAUST_PATH}\"|g" config.json \
-&& sed -i 's/127.0.0.1/0.0.0.0/g' config.json \
-&& make docker
+RUN cd /build && sed -i "s|.\/pics|${IMG_PATH}|g" config.json  \
+    && sed -i "s|\"\"|\"${EXHAUST_PATH}\"|g" config.json  \
+    && sed -i 's/127.0.0.1/0.0.0.0/g' config.json  \
+    && go build -ldflags="-s -w" -o webp-server .



--- a/3
+++ b/3
@ -14,6 +14,7 @@ default:
 	make clean
 	go build -o builds/webp-server-$(OS)-$(ARCH) .
 	ls builds
+
 all:
 	make clean
 	./scripts/build.sh $(OS) $(ARCH)
@ -26,4 +27,4 @@ clean:
 	rm -rf prefetch

 docker:
-	go build -ldflags="-s -w" -o webp-server .
+	DOCKER_BUILDKIT=1 docker build -t webpsh/webps .
--- a/config.go
+++ b/config.go
@ -8,9 +8,10 @@ type Config struct {
 	Host         string   `json:"HOST"`
 	Port         string   `json:"PORT"`
 	ImgPath      string   `json:"IMG_PATH"`
-	Quality      string   `json:"QUALITY"`
+	Quality      float32  `json:"QUALITY,string"`
 	AllowedTypes []string `json:"ALLOWED_TYPES"`
 	ExhaustPath  string   `json:"EXHAUST_PATH"`
+	EnableAVIF   bool     `json:"ENABLE_AVIF"`
 }

 var (
@ -21,7 +22,7 @@ var (
 	prefetch, proxyMode      bool
 	remoteRaw                = "remote-raw"
 	config                   Config
-	version                  = "0.3.2"
+	version                  = "0.4.0"
 	releaseUrl               = "https://github.com/webp-sh/webp_server_go/releases/latest/download/"
 )

@ -33,7 +34,8 @@ const (
  "QUALITY": "80",
  "IMG_PATH": "./pics",
  "EXHAUST_PATH": "./exhaust",
-  "ALLOWED_TYPES": ["jpg","png","jpeg","bmp"]
+  "ALLOWED_TYPES": ["jpg","png","jpeg","bmp"],
+  "ENABLE_AVIF": false
 }`

 	sampleSystemd = `
@ -53,3 +55,8 @@ RestartSec=3s
 [Install]
 WantedBy=multi-user.target`
 )
+
+const (
+	webpMax = 16383
+	avifMax = 65536
+)
--- a/encoder.go
+++ b/encoder.go
@ -3,70 +3,152 @@ package main
 import (
 	"bytes"
 	"errors"
+	"fmt"
+	"github.com/Kagami/go-avif"
+	"github.com/chai2010/webp"
+	log "github.com/sirupsen/logrus"
+	"golang.org/x/image/bmp"
 	"image"
-	"image/gif"
 	"image/jpeg"
 	"image/png"
 	"io/ioutil"
+	"os"
 	"path"
+	"path/filepath"
+	"runtime"
 	"strings"
-
-	log "github.com/sirupsen/logrus"
-
-	"github.com/chai2010/webp"
-	"golang.org/x/image/bmp"
 )

-func webpEncoder(p1, p2 string, quality float32, Log bool, c chan int) (err error) {
-	// if convert fails, return error; success nil
+func convertFilter(raw, avifPath, webpPath string, c chan int) {
+	// all absolute paths

-	log.Debugf("target: %s with quality of %f", path.Base(p1), quality)
-	var buf bytes.Buffer
-	var img image.Image
+	if !imageExists(avifPath) && config.EnableAVIF {
+		convertImage(raw, avifPath, "avif")
+	}

-	data, err := ioutil.ReadFile(p1)
+	if !imageExists(webpPath) {
+		convertImage(raw, webpPath, "webp")
+	}
+
+	if c != nil {
+		c <- 1
+	}
+}
+
+func convertImage(raw, optimized, itype string) {
+	// we don't have abc.jpg.png1582558990.webp
+	// delete the old pic and convert a new one.
+	// optimized: /home/webp_server/exhaust/path/to/tsuki.jpg.1582558990.webp
+	// we'll delete file starts with /home/webp_server/exhaust/path/to/tsuki.jpg.ts.itype
+
+	s := strings.Split(path.Base(optimized), ".")
+	pattern := path.Join(path.Dir(optimized), s[0]+"."+s[1]+".*."+s[len(s)-1])
+
+	matches, err := filepath.Glob(pattern)
 	if err != nil {
-		chanErr(c)
-		return
+		log.Error(err.Error())
+	} else {
+		for _, p := range matches {
+			_ = os.Remove(p)
+		}
+	}
+
+	//we need to create dir first
+	err = os.MkdirAll(path.Dir(optimized), 0755)
+	//q, _ := strconv.ParseFloat(config.Quality, 32)
+
+	switch itype {
+	case "webp":
+		webpEncoder(raw, optimized, config.Quality)
+	case "avif":
+		avifEncoder(raw, optimized, config.Quality)
+	}
+
+}
+
+func readRawImage(imgPath string, maxPixel int) (img image.Image, err error) {
+	data, err := ioutil.ReadFile(imgPath)
+	if err != nil {
+		log.Errorln(err)
 	}

 	contentType := getFileContentType(data[:512])
 	if strings.Contains(contentType, "jpeg") {
-		img, _ = jpeg.Decode(bytes.NewReader(data))
+		img, err = jpeg.Decode(bytes.NewReader(data))
 	} else if strings.Contains(contentType, "png") {
-		img, _ = png.Decode(bytes.NewReader(data))
+		img, err = png.Decode(bytes.NewReader(data))
 	} else if strings.Contains(contentType, "bmp") {
-		img, _ = bmp.Decode(bytes.NewReader(data))
-	} else if strings.Contains(contentType, "gif") {
-		// TODO: need to support animated webp
-		log.Warn("Gif support is not perfect!")
-		img, _ = gif.Decode(bytes.NewReader(data))
+		img, err = bmp.Decode(bytes.NewReader(data))
+	}
+	if err != nil || img == nil {
+		errinfo := fmt.Sprintf("image file %s is corrupted: %v", imgPath, err)
+		log.Errorln(errinfo)
+		return nil, errors.New(errinfo)
 	}

-	if img == nil {
-		msg := "image file " + path.Base(p1) + " is corrupted or not supported"
-		log.Debug(msg)
-		err = errors.New(msg)
-		chanErr(c)
-		return
+	x, y := img.Bounds().Max.X, img.Bounds().Max.Y
+	if x > maxPixel || y > maxPixel {
+		errinfo := fmt.Sprintf("WebP: %s(%dx%d) is too large", imgPath, x, y)
+		log.Warnf(errinfo)
+		return nil, errors.New(errinfo)
 	}

-	if err = webp.Encode(&buf, img, &webp.Options{Lossless: false, Quality: quality}); err != nil {
-		log.Error(err)
-		chanErr(c)
-		return
-	}
-	if err = ioutil.WriteFile(p2, buf.Bytes(), 0644); err != nil {
-		log.Error(err)
-		chanErr(c)
-		return
-	}
-
-	if Log {
-		log.Info("Save to " + p2 + " ok!\n")
-	}
-
-	chanErr(c)
-
-	return nil
+	return img, nil
+}
+
+func avifEncoder(p1, p2 string, quality float32) {
+	var img image.Image
+	dst, err := os.Create(p2)
+	if err != nil {
+		log.Fatalf("Can't create destination file: %v", err)
+	}
+	// AVIF has a maximum resolution of 65536 x 65536 pixels.
+	img, err = readRawImage(p1, avifMax)
+	if err != nil {
+		return
+	}
+
+	err = avif.Encode(dst, img, &avif.Options{
+		Threads:        runtime.NumCPU(),
+		Speed:          avif.MaxSpeed,
+		Quality:        int((100 - quality) / 100 * avif.MaxQuality),
+		SubsampleRatio: nil,
+	})
+
+	if err != nil {
+		log.Warnf("Can't encode source image: %v to AVIF", err)
+	}
+
+	convertLog("AVIF", p1, p2, quality)
+}
+
+func webpEncoder(p1, p2 string, quality float32) {
+	// if convert fails, return error; success nil
+	var buf bytes.Buffer
+	var img image.Image
+	// The maximum pixel dimensions of a WebP image is 16383 x 16383.
+	img, err := readRawImage(p1, webpMax)
+	if err != nil {
+		return
+	}
+
+	err = webp.Encode(&buf, img, &webp.Options{Lossless: false, Quality: quality})
+	if err != nil {
+		log.Warnf("Can't encode source image: %v to WebP", err)
+	}
+
+	if err := ioutil.WriteFile(p2, buf.Bytes(), 0644); err != nil {
+		log.Error(err)
+		return
+	}
+
+	convertLog("WebP", p1, p2, quality)
+
+}
+
+func convertLog(itype, p1 string, p2 string, quality float32) {
+	oldf, _ := os.Stat(p1)
+	newf, _ := os.Stat(p2)
+	log.Infof("%s@%.2f%%: %s->%s %d->%d %.2f%% deflated", itype, quality,
+		p1, p2, oldf.Size(), newf.Size(), float32(newf.Size())/float32(oldf.Size())*100)
 }
--- a/encoder_test.go
+++ b/encoder_test.go
@ -4,65 +4,63 @@ import (
 	"github.com/stretchr/testify/assert"
 	"io/ioutil"
 	"os"
+	"path"
 	"path/filepath"
+	"strings"
 	"testing"
 )

 func walker() []string {
 	var list []string
-	_ = filepath.Walk("./pics", func(path string, info os.FileInfo, err error) error {
-		if !info.IsDir() {
-			list = append(list, path)
+	_ = filepath.Walk("./pics", func(p string, info os.FileInfo, err error) error {
+		if !info.IsDir() && !strings.HasPrefix(path.Base(p), ".") {
+			list = append(list, p)
 		}
 		return nil
 	})
 	return list
 }

-func TestWebpEncoder(t *testing.T) {
-	var webp = "/tmp/test-result.webp"
+func TestWebPEncoder(t *testing.T) {
+	// Go through every files
+	var dest = "/tmp/test-result"
 	var target = walker()
-
 	for _, f := range target {
-		//fmt.Println(b, c, webp)
-		runEncoder(t, f, webp)
+		runEncoder(t, f, dest)
 	}
-	_ = os.Remove(webp)
+	_ = os.Remove(dest)
+}

-	// test error
-	err := webpEncoder("./pics/empty.jpg", webp, 80, true, nil)
-	assert.NotNil(t, err)
-	_ = os.Remove(webp)
+func TestAvifEncoder(t *testing.T) {
+	// Only one file: img_over_16383px.jpg might cause memory issues on CI environment
+	var dest = "/tmp/test-result"
+	avifEncoder("./pics/big.jpg", dest, 80)
+	assertType(t, dest, "image/avif")
 }

 func TestNonExistImage(t *testing.T) {
-	var webp = "/tmp/test-result.webp"
-	// test error
-	var err = webpEncoder("./pics/empty.jpg", webp, 80, true, nil)
-	assert.NotNil(t, err)
-	_ = os.Remove(webp)
+	var dest = "/tmp/test-result"
+	webpEncoder("./pics/empty.jpg", dest, 80)
+	avifEncoder("./pics/empty.jpg", dest, 80)
 }

 func TestConvertFail(t *testing.T) {
-	var webp = "/tmp/test-result.webp"
-	var err = webpEncoder("./pics/webp_server.jpg", webp, -1, true, nil)
-	assert.NotNil(t, t, err)
+	var dest = "/tmp/test-result"
+	webpEncoder("./pics/webp_server.jpg", dest, -1)
+	avifEncoder("./pics/webp_server.jpg", dest, -1)
 }

-func runEncoder(t *testing.T, file string, webp string) {
-	var c chan int
-	//t.Logf("convert from %s to %s", file, webp)
-	var err = webpEncoder(file, webp, 80, true, c)
-	if file == "pics/empty.jpg" && err != nil {
+func runEncoder(t *testing.T, file string, dest string) {
+	if file == "pics/empty.jpg" {
 		t.Log("Empty file, that's okay.")
-	} else if err != nil {
-		t.Fatalf("Fatal, convert failed for %s: %v ", file, err)
-	}
-
-	data, _ := ioutil.ReadFile(webp)
-	types := getFileContentType(data[:512])
-	if types != "image/webp" {
-		t.Fatal("Fatal, file type is wrong!")
 	}
+	webpEncoder(file, dest, 80)
+	assertType(t, dest, "image/webp")

 }
+
+func assertType(t *testing.T, dest, mime string) {
+	data, _ := ioutil.ReadFile(dest)
+	types := getFileContentType(data[:512])
+	assert.Equalf(t, mime, types, "File %s should be %s", dest, mime)
+}
--- a/go.mod
+++ b/go.mod
@ -3,11 +3,18 @@ module webp_server_go
 go 1.15

 require (
+	github.com/Kagami/go-avif v0.1.0
 	github.com/chai2010/webp v1.1.0
 	github.com/gofiber/fiber/v2 v2.4.0
-	github.com/sirupsen/logrus v1.6.0
+	github.com/h2non/filetype v1.1.3
+	github.com/konsorten/go-windows-terminal-sequences v1.0.3 // indirect
+	github.com/schollz/progressbar/v3 v3.8.3
+	github.com/sirupsen/logrus v1.8.1
+	github.com/staktrace/go-update v0.0.0-20210525161054-fc019945f9a2
 	github.com/stretchr/testify v1.3.0
+	github.com/valyala/fasthttp v1.18.0
 	golang.org/x/image v0.0.0-20200119044424-58c23975cae1
+	golang.org/x/sys v0.0.0-20211204120058-94396e421777 // indirect
 )

 replace (
--- a/go.sum
+++ b/go.sum
@ -1,15 +1,37 @@
+github.com/Kagami/go-avif v0.1.0 h1:8GHAGLxCdFfhpd4Zg8j1EqO7rtcQNenxIDerC/uu68w=
+github.com/Kagami/go-avif v0.1.0/go.mod h1:OPmPqzNdQq3+sXm0HqaUJQ9W/4k+Elbc3RSfJUemDKA=
 github.com/andybalholm/brotli v1.0.0 h1:7UCwP93aiSfvWpapti8g88vVVGp2qqtGyePsSuDafo4=
 github.com/andybalholm/brotli v1.0.0/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/h2non/filetype v1.1.3 h1:FKkx9QbD7HR/zjK1Ia5XiBsq9zdLi5Kf3zGyFTAFkGg=
+github.com/h2non/filetype v1.1.3/go.mod h1:319b3zT68BvV+WRj7cwy856M2ehB3HqNOt6sy1HndBY=
+github.com/k0kubun/go-ansi v0.0.0-20180517002512-3bf9e2903213/go.mod h1:vNUNkEQ1e29fT/6vq2aBdFsgNPmy8qMdSay1npru+Sw=
 github.com/klauspost/compress v1.10.7 h1:7rix8v8GpI3ZBb0nSozFRgbtXKv+hOe+qfEpZqybrAg=
 github.com/klauspost/compress v1.10.7/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
+github.com/mattn/go-runewidth v0.0.13 h1:lTGmDsbAYt5DmK6OnoV7EuIF1wEIFAcxld6ypU4OSgU=
+github.com/mattn/go-runewidth v0.0.13/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db h1:62I3jR2EmQ4l5rM/4FEfDWcRD+abF5XlKShorW5LRoQ=
+github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db/go.mod h1:l0dey0ia/Uv7NcFFVbCLtqEBQbrT4OCwCSKTEv6enCw=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
+github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/schollz/progressbar/v3 v3.8.3 h1:FnLGl3ewlDUP+YdSwveXBaXs053Mem/du+wr7XSYKl8=
+github.com/schollz/progressbar/v3 v3.8.3/go.mod h1:pWnVCjSBZsT2X3nx9HfRdnCDrpbevliMeoEVhStwHko=
 github.com/sirupsen/logrus v1.6.0 h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I=
 github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
+github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
+github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
+github.com/staktrace/go-update v0.0.0-20210525161054-fc019945f9a2 h1:kyTDvRL8TyTHOx0aK1PKMPVfkI7rCLDC1nrKF7SYOBc=
+github.com/staktrace/go-update v0.0.0-20210525161054-fc019945f9a2/go.mod h1:yzHsbjWRHVF1vVGsluwqCc2TvogFSx9C8TeBh34cMb0=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
@ -23,16 +45,29 @@ github.com/webp-sh/webp v1.2.0 h1:WiAR1M4Cz50Ehv0vP8VaBZwuTqBgLxcGMaBV23zLVDA=
 github.com/webp-sh/webp v1.2.0/go.mod h1:DWmBXPtpA/zfTgEgWxAlsER3B7nXFvDtCi1YY+K5N9w=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 h1:HWj/xjIHfjYU5nVXpTM0s39J9CbLn7Cc5a7IC5rwsMQ=
+golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/image v0.0.0-20200119044424-58c23975cae1 h1:5h3ngYt7+vXCDZCup/HkCQgW5XwmSvR/nA2JmJ0RErg=
 golang.org/x/image v0.0.0-20200119044424-58c23975cae1/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20201016165138-7b1cca2348c0/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20201210223839-7e3030f88018 h1:XKi8B/gRBuTZN1vU9gFsLMm6zVz5FSCDzm8JYACnjy8=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201210223839-7e3030f88018/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210910150752-751e447fb3d0 h1:xrCZDmdtoloIiooiA9q0OQb9r8HejIHYoHGhGCe1pGg=
+golang.org/x/sys v0.0.0-20210910150752-751e447fb3d0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211204120058-94396e421777 h1:QAkhGVjOxMa+n4mlsAWeAU+BMZmimQAaNiMu+iUi94E=
+golang.org/x/sys v0.0.0-20211204120058-94396e421777/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b h1:9zKuko04nR4gjZ4+DNjHqRlAJqbJETHwiNKDqTfOjfE=
+golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
--- a/helper.go
+++ b/helper.go
@ -1,6 +1,7 @@
 package main

 import (
+	"bytes"
 	"fmt"
 	"hash/crc32"
 	"io"
@ -11,26 +12,35 @@ import (
 	"path/filepath"
 	"strconv"

+	"github.com/valyala/fasthttp"
+
 	"strings"

+	"github.com/h2non/filetype"
 	log "github.com/sirupsen/logrus"
 )

-func chanErr(ccc chan int) {
-	if ccc != nil {
-		ccc <- 1
-	}
+func avifMatcher(buf []byte) bool {
+	// 0000001C 66747970 6D696631 00000000 6D696631 61766966 6D696166 000000F4
+	return len(buf) > 1 && bytes.Equal(buf[:28], []byte{
+		0x0, 0x0, 0x0, 0x1c,
+		0x66, 0x74, 0x79, 0x70,
+		0x6d, 0x69, 0x66, 0x31,
+		0x0, 0x0, 0x0, 0x0,
+		0x6d, 0x69, 0x66, 0x31,
+		0x61, 0x76, 0x69, 0x66,
+		0x6d, 0x69, 0x61, 0x66,
+	})
 }
-
 func getFileContentType(buffer []byte) string {
-	// Use the net/http package's handy DectectContentType function. Always returns a valid
-	// content-type by returning "application/octet-stream" if no others seemed to match.
-	contentType := http.DetectContentType(buffer)
-	return contentType
+	var avifType = filetype.NewType("avif", "image/avif")
+	filetype.AddMatcher(avifType, avifMatcher)
+	kind, _ := filetype.Match(buffer)
+	return kind.MIME.Value
 }

-func fileCount(dir string) int {
-	count := 0
+func fileCount(dir string) int64 {
+	var count int64 = 0
 	_ = filepath.Walk(dir,
 		func(path string, info os.FileInfo, err error) error {
 			if err != nil {
@ -53,6 +63,17 @@ func imageExists(filename string) bool {
 	return !info.IsDir()
 }

+func checkAllowedType(imgFilename string) bool {
+	imgFilename = strings.ToLower(imgFilename)
+	for _, allowedType := range config.AllowedTypes {
+		allowedType = "." + strings.ToLower(allowedType)
+		if strings.HasSuffix(imgFilename, allowedType) {
+			return true
+		}
+	}
+	return false
+}
+
 // Check for remote filepath, e.g: https://test.webp.sh/node.png
 // return StatusCode, etagValue and length
 func getRemoteImageInfo(fileUrl string) (int, string, string) {
@ -106,22 +127,24 @@ func cleanProxyCache(cacheImagePath string) {
 	}
 }

-func genWebpAbs(RawImagePath string, ExhaustPath string, ImgFilename string, reqURI string) (string, string) {
+func genOptimizedAbs(rawImagePath string, exhaustPath string, imageName string, reqURI string) (string, string) {
 	// get file mod time
-	STAT, err := os.Stat(RawImagePath)
+	STAT, err := os.Stat(rawImagePath)
 	if err != nil {
 		log.Error(err.Error())
 		return "", ""
 	}
 	ModifiedTime := STAT.ModTime().Unix()
 	// webpFilename: abc.jpg.png -> abc.jpg.png.1582558990.webp
-	WebpFilename := fmt.Sprintf("%s.%d.webp", ImgFilename, ModifiedTime)
-	cwd, _ := os.Getwd()
+	webpFilename := fmt.Sprintf("%s.%d.webp", imageName, ModifiedTime)
+	// avifFilename: abc.jpg.png -> abc.jpg.png.1582558990.avif
+	avifFilename := fmt.Sprintf("%s.%d.avif", imageName, ModifiedTime)

 	// /home/webp_server/exhaust/path/to/tsuki.jpg.1582558990.webp
 	// Custom Exhaust: /path/to/exhaust/web_path/web_to/tsuki.jpg.1582558990.webp
-	WebpAbsolutePath := path.Clean(path.Join(ExhaustPath, path.Dir(reqURI), WebpFilename))
-	return cwd, WebpAbsolutePath
+	webpAbsolutePath := path.Clean(path.Join(exhaustPath, path.Dir(reqURI), webpFilename))
+	avifAbsolutePath := path.Clean(path.Join(exhaustPath, path.Dir(reqURI), avifFilename))
+	return avifAbsolutePath, webpAbsolutePath
 }

 func genEtag(ImgAbsPath string) string {
@ -136,64 +159,60 @@ func genEtag(ImgAbsPath string) string {
 	return fmt.Sprintf(`W/"%d-%08X"`, len(data), crc)
 }

-func getCompressionRate(RawImagePath string, webpAbsPath string) string {
+func getCompressionRate(RawImagePath string, optimizedImg string) string {
 	originFileInfo, err := os.Stat(RawImagePath)
 	if err != nil {
-		log.Warnf("fail to get raw image %v", err)
+		log.Warnf("Failed to get raw image %v", err)
 		return ""
 	}
-	webpFileInfo, err := os.Stat(webpAbsPath)
+	optimizedFileInfo, err := os.Stat(optimizedImg)
 	if err != nil {
-		log.Warnf("fail to get webp image %v", err)
+		log.Warnf("Failed to get optimized image %v", err)
 		return ""
 	}
-	compressionRate := float64(webpFileInfo.Size()) / float64(originFileInfo.Size())
-	log.Debugf("The compress rate is %d/%d=%.2f", originFileInfo.Size(), webpFileInfo.Size(), compressionRate)
+	compressionRate := float64(optimizedFileInfo.Size()) / float64(originFileInfo.Size())
+	log.Debugf("The compression rate is %d/%d=%.2f", originFileInfo.Size(), optimizedFileInfo.Size(), compressionRate)
 	return fmt.Sprintf(`%.2f`, compressionRate)
 }

-func goOrigin(header, ua string) bool {
-	// We'll first check accept headers, if accept headers is false, we'll then go to UA part
-	if headerOrigin(header) && uaOrigin(ua) {
-		return true
-	} else {
-		return false
-	}
-}
+func guessSupportedFormat(header *fasthttp.RequestHeader) []string {
+	var supported = map[string]bool{
+		"raw":  true,
+		"webp": false,
+		"avif": false}

-func uaOrigin(ua string) bool {
-	// iOS 14 and iPadOS 14 supports webp, the identification token is iPhone OS 14_2_1 and CPU OS 14_2
-	// for more information, please check test case
-	if strings.Contains(ua, "iPhone OS 14") || strings.Contains(ua, "CPU OS 14") {
-		// this is iOS 14/iPadOS 14
-		return false
-	} else if strings.Contains(ua, "Firefox") || strings.Contains(ua, "Chrome") {
-		// Chrome or firefox on macOS Windows
+	var ua = string(header.Peek("user-agent"))
+	var accept = strings.ToLower(string(header.Peek("accept")))
+	log.Debugf("%s\t%s\n", ua, accept)
+
+	if strings.Contains(accept, "image/webp") {
+		supported["webp"] = true
+	}
+	if strings.Contains(accept, "image/avif") {
+		supported["avif"] = true
+	}
+
+	// chrome on iOS will not send valid image accept header
+	if strings.Contains(ua, "iPhone OS 14") || strings.Contains(ua, "CPU OS 14") ||
+		strings.Contains(ua, "iPhone OS 15") || strings.Contains(ua, "CPU OS 15") {
+		supported["webp"] = true
 	} else if strings.Contains(ua, "Android") || strings.Contains(ua, "Linux") {
-		// on Android and Linux
-	} else if strings.Contains(ua, "FxiOS") || strings.Contains(ua, "CriOS") {
-		//firefox and Chrome on iOS
-		return true
-	} else {
-		return true
+		supported["webp"] = true
 	}
-	return false
+
+	var accepted []string
+	for k, v := range supported {
+		if v {
+			accepted = append(accepted, k)
+		}
+	}
+	return accepted
+
 }

-func headerOrigin(header string) bool {
-	// Webkit is really weird especially on iOS, it doesn't even send out effective accept headers.
-	// Head to test case if you want to know more
-	if strings.Contains(header, "image/webp") {
-		return false
-	} else {
-		// go to origin
-		return true
-	}
-}
-
-func chooseProxy(proxyRawSize string, webpAbsPath string) bool {
+func chooseProxy(proxyRawSize string, optimizedAbs string) bool {
 	var proxyRaw, _ = strconv.Atoi(proxyRawSize)
-	webp, _ := ioutil.ReadFile(webpAbsPath)
+	webp, _ := ioutil.ReadFile(optimizedAbs)
 	if len(webp) > proxyRaw {
 		return true
 	} else {
@ -201,12 +220,20 @@ func chooseProxy(proxyRawSize string, webpAbsPath string) bool {
 	}
 }

-func chooseLocalSmallerFile(rawImageAbs, webpAbsPath string) string {
-	raw, _ := ioutil.ReadFile(rawImageAbs)
-	webp, _ := ioutil.ReadFile(webpAbsPath)
-	if len(webp) > len(raw) {
-		return rawImageAbs
-	} else {
-		return webpAbsPath
+func findSmallestFiles(files []string) string {
+	// walk files
+	var small int64
+	var final string
+	for _, f := range files {
+		stat, err := os.Stat(f)
+		if err != nil {
+			log.Warnf("%s not found on filesystem", f)
+			continue
+		}
+		if stat.Size() < small || small == 0 {
+			small = stat.Size()
+			final = f
+		}
 	}
+	return final
 }
--- a/helper_test.go
+++ b/helper_test.go
@ -1,31 +1,33 @@
 package main

 import (
+	log "github.com/sirupsen/logrus"
+	"github.com/valyala/fasthttp"
 	"io/ioutil"
 	"net/http"
 	"path/filepath"
+	"sort"
 	"strings"
 	"testing"

 	"github.com/stretchr/testify/assert"
 )

-// test this file: go test -v -cover .
+// test all files: go test -v -cover .
+// test one case: go test -v -run TestSelectFormat
+
 func TestGetFileContentType(t *testing.T) {
-	var data = []byte("hello")
-	var expected = "text/plain; charset=utf-8"
+	var data = []byte("remember remember the 5th of november")
+	var expected = ""
 	var result = getFileContentType(data)
-
 	assert.Equalf(t, result, expected, "Result: [%s], Expected: [%s]", result, expected)
-
 }

 func TestFileCount(t *testing.T) {
-	var data = ".github"
-	var expected = 2
+	var data = "scripts"
+	var expected int64 = 2
 	var result = fileCount(data)
 	assert.Equalf(t, result, expected, "Result: [%d], Expected: [%d]", result, expected)
-
 }

 func TestImageExists(t *testing.T) {
@ -43,7 +45,7 @@ func TestImageExists(t *testing.T) {
 }

 func TestGenWebpAbs(t *testing.T) {
-	cwd, cooked := genWebpAbs("./pics/webp_server.png", "/tmp",
+	cwd, cooked := genOptimizedAbs("./pics/webp_server.png", "/tmp",
 		"test", "a")
 	if !strings.Contains(cwd, "webp_server_go") {
 		t.Logf("Result: [%v], Expected: [%v]", cwd, "webp_server_go")
@ -71,108 +73,63 @@ func TestGenEtag(t *testing.T) {

 }

-func TestGoOrigin(t *testing.T) {
+func TestSelectFormat(t *testing.T) {
 	// this is a complete test case for webp compatibility
 	// func goOrigin(header, ua string) bool
 	// UNLESS YOU KNOW WHAT YOU ARE DOING, DO NOT CHANGE THE TEST CASE MAPPING HERE.
-	var testCase = map[[2]string]bool{
+	var fullSupport = []string{"avif", "webp", "raw"}
+	var webpSupport = []string{"webp", "raw"}
+	var jpegSupport = []string{"raw"}
+	var testCase = map[[2]string][]string{
+		// Latest Chrome on Windows, macOS, linux, Android and iOS 13
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36"}:        fullSupport,
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36"}:  fullSupport,
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9", "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36"}:                  fullSupport,
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9", "Mozilla/5.0 (Linux; Android 10) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.60 Mobile Safari/537.36"}:           fullSupport,
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9", "Mozilla/5.0 (Linux; Android 6.0; HTC M8t) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.74 Mobile Safari/537.36"}: fullSupport,
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", "HTCM8t_LTE/1.0 Android/4.4 release/2013 Browser/WAP2.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 AppleWebKit/534.30"}:                                                                      webpSupport,
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPhone; CPU iPhone OS 13_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/83.0.4103.63 Mobile/15E148 Safari/604.1"}:                                                     jpegSupport,
+
 		// macOS Catalina Safari
-		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Safari/605.1.15"}: true,
-		// macOS Chrome
-		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9", "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.88 Safari/537.36"}: false,
-		// iOS14 Safari
-		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPhone; CPU iPhone OS 14_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Mobile/15E148 Safari/604.1"}: false,
-		// iOS14 Chrome
-		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPhone; CPU iPhone OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1"}: false,
-		// iPadOS 14 Safari
-		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPad; CPU OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Mobile/15E148 Safari/604.1"}: false,
-		// iPadOS 14 Chrome
-		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPad; CPU OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1"}: false,
-		// Warning: these three are real capture headers - I don't have iOS/iPadOS prior to version 14
-		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1 Safari/605.1.15"}:                         true,
-		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPad; CPU OS 10_15_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/25.0 Mobile/15E148 Safari/605.1.15"}:            true,
-		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPhone; CPU iPhone OS 13_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/83.0.4103.63 Mobile/15E148 Safari/604.1"}: true,
-	}
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Safari/605.1.15"}: jpegSupport,

-	for value, is := range testCase {
-		assert.Equalf(t, is, goOrigin(value[0], value[1]), "[%v]:[%s]", value, is)
-	}
-}
+		// iOS14 Safari and Chrome
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPhone; CPU iPhone OS 14_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Mobile/15E148 Safari/604.1"}:   webpSupport,
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPhone; CPU iPhone OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1"}: webpSupport,

-func TestUaOrigin(t *testing.T) {
-	// reference: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent/Firefox
-	// https://developer.chrome.com/multidevice/user-agent#chrome_for_ios_user_agent
+		// iPadOS 14 Safari and Chrome
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPad; CPU OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Mobile/15E148 Safari/604.1"}:     webpSupport,
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPad; CPU OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1"}: webpSupport,

-	// UNLESS YOU KNOW WHAT YOU ARE DOING, DO NOT CHANGE THE TEST CASE MAPPING HERE.
-	var testCase = map[string]bool{
-		// Chrome on Windows, macOS, linux, iOS and Android
-		"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36":                            false,
-		"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36":                      false,
-		"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36":                                      false,
-		"Mozilla/5.0 (iPhone; CPU iPhone OS 13_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/83.0.4103.63 Mobile/15E148 Safari/604.1": true,
-		"Mozilla/5.0 (Linux; Android 10) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.60 Mobile Safari/537.36":                               false,
-
-		// Firefox on Windows, macOS, linux, iOS and Android
-		"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0":                                                     false,
-		"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:76.0) Gecko/20100101 Firefox/76.0":                                                 false,
-		"Mozilla/5.0 (X11; Linux i686; rv:76.0) Gecko/20100101 Firefox/76.0":                                                                 false,
-		"Mozilla/5.0 (iPad; CPU OS 10_15_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/25.0 Mobile/15E148 Safari/605.1.15": true,
-		"Mozilla/5.0 (Android 10; Mobile; rv:68.0) Gecko/68.0 Firefox/68.0":                                                                  false,
-
-		// Safari on macOS and iOS
-		"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1 Safari/605.1.15":            true,
-		"Mozilla/5.0 (iPad; CPU OS 13_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.1 Mobile/15E148 Safari/604.1": true,
-
-		// WeChat on iOS, Windows, and Android
-		"Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_3 like Mac OS X) AppleWebKit/603.3.8 (KHTML, like Gecko) Mobile/14G60 wxwork/2.1.5 MicroMessenger/6.3.22":                                                                         true,
-		"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36 MicroMessenger/6.5.2.501 NetType/WIFI WindowsWechat QBCore/3.43.691.400 QQBrowser/9.0.2524.400":              false,
-		"Mozilla/5.0 (Linux; Android 7.0; LG-H831 Build/NRD90U; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 MicroMessenger/6.6.7.1303(0x26060743) NetType/WIFI Language/zh_TW": false,
+		// iOS 15 Safari, Firefox and Chrome
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPhone; CPU iPhone OS 15_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.1 Mobile/15E148 Safari/604.1"}:     webpSupport,
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPhone; CPU iPhone OS 15_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/39.0  Mobile/15E148 Safari/605.1.15"}:   webpSupport,
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPhone; CPU iPhone OS 15_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/96.0.4664.53 Mobile/15E148 Safari/604.1"}: webpSupport,

 		// IE
-		"Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; AS; rv:11.0) like Gecko": true,
-		"Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)":  true,
-
+		[2]string{"application/x-ms-application, image/jpeg, application/xaml+xml, image/gif, image/pjpeg, application/x-ms-xbap, */*", "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; AS; rv:11.0) like Gecko"}: jpegSupport,
 		// Others
-		"PostmanRuntime/7.26.1": true,
-		"curl/7.64.1":           true,
+		[2]string{"", "PostmanRuntime/7.26.1"}:            jpegSupport,
+		[2]string{"", "curl/7.64.1"}:                      jpegSupport,
+		[2]string{"image/webp", "curl/7.64.1"}:            webpSupport,
+		[2]string{"image/avif,image/webp", "curl/7.64.1"}: fullSupport,

-		// these four are captured from iOS14/iPadOS14, which supports webp
-		"Mozilla/5.0 (iPhone; CPU iPhone OS 14_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Mobile/15E148 Safari/604.1":     false,
-		"Mozilla/5.0 (iPhone; CPU iPhone OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1\n": false,
-		"Mozilla/5.0 (iPad; CPU OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Mobile/15E148 Safari/604.1":                false,
-		"Mozilla/5.0 (iPad; CPU OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1":            false,
+		// some weird browsers
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Mozilla/5.0 (iPhone; CPU iPhone OS 15_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 MicroMessenger/8.0.16(0x18001033) NetType/WIFI Language/zh_CN"}:                                                                                                                             webpSupport,
+		[2]string{"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", "Mozilla/5.0 (Linux; Android 6.0; HTC M8t Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/45.0.2454.95 Mobile Safari/537.36 MMWEBID/4285 MicroMessenger/8.0.15.2001(0x28000F41) Process/tools WeChat/arm32 Weixin GPVersion/1 NetType/WIFI Language/zh_CN ABI/arm32"}: webpSupport,
+	}
+	for browser, expected := range testCase {
+		var header fasthttp.RequestHeader
+		header.Set("accept", browser[0])
+		header.Set("user-agent", browser[1])
+		guessed := guessSupportedFormat(&header)
+
+		sort.Strings(expected)
+		sort.Strings(guessed)
+		log.Infof("%s expected%s --- actual %s", browser, expected, guessed)
+		assert.Equal(t, expected, guessed)
 	}

-	for browser, is := range testCase {
-		assert.Equalf(t, is, uaOrigin(browser), "[%v]:[%s]", is, browser)
-	}
-
-}
-
-func TestHeaderOrigin(t *testing.T) {
-	// Chrome: Accept: image/avif,image/webp,image/apng,image/*,*/*;q=0.8
-	// Safari 版本14.0.1 (15610.2.11.51.10, 15610): Accept: image/png,image/svg+xml,image/*;q=0.8,video/*;q=0.8,*/*;q=0.5
-	// Safari Technology Preview Release 116 (Safari 14.1, WebKit 15611.1.5.3) Accept: image/png,image/svg+xml,image/*;q=0.8,video/*;q=0.8,*/*;q=0.5
-
-	// UNLESS YOU KNOW WHAT YOU ARE DOING, DO NOT CHANGE THE TEST CASE MAPPING HERE.
-	var testCase = map[string]bool{
-		"image/avif,image/webp,image/apng,image/*,*/*;q=0.8": false,
-		"*/*": true,
-		"image/png,image/svg+xml,image/*;q=0.8,video/*;q=0.8,*/*;q=0.5": true,
-		"I don't know what it is:-)":                                    true,
-	}
-	for header, is := range testCase {
-		assert.Equalf(t, is, headerOrigin(header), "[%v]:[%s]", is, header)
-	}
-}
-
-func TestChanErr(t *testing.T) {
-	var value = 2
-	var testC = make(chan int, 2)
-	testC <- value
-	chanErr(testC)
-	value = <-testC
-	assert.Equal(t, 2, value)
 }

 func TestGetRemoteImageInfo(t *testing.T) {
@ -197,7 +154,7 @@ func TestFetchRemoteImage(t *testing.T) {
 	err := fetchRemoteImage(fp, url)
 	assert.Equal(t, err, nil)
 	data, _ := ioutil.ReadFile(fp)
-	assert.Equal(t, "image/x-icon", getFileContentType(data))
+	assert.Equal(t, "image/vnd.microsoft.icon", getFileContentType(data))

 	// test can't create file
 	err = fetchRemoteImage("/", url)
--- a/pics/big.webp
+++ b/pics/big.webp
--- a/pics/img_over_16383px.jpg
+++ b/pics/img_over_16383px.jpg
--- a/pics/jpg_without_eoi.jpg
+++ b/pics/jpg_without_eoi.jpg
--- a/prefetch.go
+++ b/prefetch.go
@ -2,49 +2,49 @@ package main

 import (
 	"fmt"
+	"github.com/schollz/progressbar/v3"
+	log "github.com/sirupsen/logrus"
 	"os"
 	"path"
 	"path/filepath"
-	"strconv"
 	"strings"
 	"time"
-
-	log "github.com/sirupsen/logrus"
 )

-func prefetchImages(confImgPath string, ExhaustPath string, QUALITY string) {
-	var sTime = time.Now()
+func prefetchImages(confImgPath string, ExhaustPath string) {
 	// maximum ongoing prefetch is depending on your core of CPU
+	var sTime = time.Now()
 	log.Infof("Prefetching using %d cores", jobs)
 	var finishChan = make(chan int, jobs)
 	for i := 0; i < jobs; i++ {
-		finishChan <- 0
+		finishChan <- 1
 	}

 	//prefetch, recursive through the dir
 	all := fileCount(confImgPath)
-	count := 0
+	var bar = progressbar.Default(all, "Prefetching...")
 	err := filepath.Walk(confImgPath,
 		func(picAbsPath string, info os.FileInfo, err error) error {
 			if err != nil {
 				return err
 			}
+			if info.IsDir() {
+				return nil
+			}
 			// RawImagePath string, ImgFilename string, reqURI string
 			proposedURI := strings.Replace(picAbsPath, confImgPath, "", 1)
-			_, p2 := genWebpAbs(picAbsPath, ExhaustPath, info.Name(), proposedURI)
-			q, _ := strconv.ParseFloat(QUALITY, 32)
-			_ = os.MkdirAll(path.Dir(p2), 0755)
-			go webpEncoder(picAbsPath, p2, float32(q), false, finishChan)
-			count += <-finishChan
-			//progress bar
-			_, _ = fmt.Fprintf(os.Stdout, "[Webp Server started] - convert in progress: %d/%d\r", count, all)
+			avif, webp := genOptimizedAbs(picAbsPath, ExhaustPath, info.Name(), proposedURI)
+			_ = os.MkdirAll(path.Dir(avif), 0755)
+			log.Infof("Prefetching %s", picAbsPath)
+			go convertFilter(picAbsPath, avif, webp, finishChan)
+			_ = bar.Add(<-finishChan)
 			return nil
 		})
+
 	if err != nil {
-		log.Debug(err)
+		log.Errorln(err)
 	}
 	elapsed := time.Since(sTime)
-	_, _ = fmt.Fprintf(os.Stdout, "Prefetch completeY(^_^)Y\n\n")
-	_, _ = fmt.Fprintf(os.Stdout, "convert %d file in %s (^_^)Y\n\n", count, elapsed)
+	_, _ = fmt.Fprintf(os.Stdout, "Prefetch completeY(^_^)Y in %s\n\n", elapsed)

 }
--- a/prefetch_test.go
+++ b/prefetch_test.go
@ -11,24 +11,15 @@ import (
 )

 func TestPrefetchImages(t *testing.T) {
-	// single thread
 	fp := "./prefetch"
 	_ = os.Mkdir(fp, 0755)
-	prefetchImages("./pics", "./prefetch", "80")
+	prefetchImages("./pics/dir1/", "./prefetch")
 	count := fileCount("./prefetch")
-	assert.Equal(t, 8, count)
-	_ = os.RemoveAll(fp)
-
-	// concurrency
-	jobs = 2
-	_ = os.Mkdir(fp, 0755)
-	prefetchImages("./pics", "./prefetch", "80")
-	count = fileCount("./prefetch")
-	assert.Equal(t, 6, count)
+	assert.Equal(t, int64(1), count)
 	_ = os.RemoveAll(fp)
 }

 func TestBadPrefetch(t *testing.T) {
 	jobs = 1
-	prefetchImages("./pics2", "./prefetch", "80")
+	prefetchImages("./pics2", "./prefetch")
 }
--- a/router.go
+++ b/router.go
@ -3,15 +3,14 @@ package main
 import (
 	"errors"
 	"fmt"
-	"github.com/gofiber/fiber/v2"
-	log "github.com/sirupsen/logrus"
+	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
 	"path"
-	"path/filepath"
-	"strconv"
-	"strings"
+
+	"github.com/gofiber/fiber/v2"
+	log "github.com/sirupsen/logrus"
 )

 func convert(c *fiber.Ctx) error {
@ -24,14 +23,12 @@ func convert(c *fiber.Ctx) error {
 		rawImageAbs = path.Join(config.ImgPath, reqURI) // /home/xxx/mypic/123.jpg
 	}
 	var imgFilename = path.Base(reqURI) // pure filename, 123.jpg
-	var finalFile string                // We'll only need one c.sendFile()
-	var ua = c.Get("User-Agent")
-	var accept = c.Get("accept")
-	log.Debugf("Incoming connection from %s@%s with %s", ua, c.IP(), imgFilename)
+	log.Debugf("Incoming connection from %s %s", c.IP(), imgFilename)

-	needOrigin := goOrigin(accept, ua)
-	if needOrigin {
-		log.Debugf("A Safari/IE/whatever user has arrived...%s", ua)
+	goodFormat := guessSupportedFormat(&c.Request().Header)
+
+	// old browser only, send the original image or fetch from remote and send.
+	if len(goodFormat) == 1 {
 		c.Set("ETag", genEtag(rawImageAbs))
 		if proxyMode {
 			localRemoteTmpPath := remoteRaw + reqURI
@ -42,20 +39,7 @@ func convert(c *fiber.Ctx) error {
 		}
 	}

-	// check ext
-	var allowed = false
-	for _, ext := range config.AllowedTypes {
-		haystack := strings.ToLower(imgFilename)
-		needle := strings.ToLower("." + ext)
-		if strings.HasSuffix(haystack, needle) {
-			allowed = true
-			break
-		} else {
-			allowed = false
-		}
-	}
-
-	if !allowed {
+	if !checkAllowedType(imgFilename) {
 		msg := "File extension not allowed! " + imgFilename
 		log.Warn(msg)
 		if imageExists(rawImageAbs) {
@ -81,45 +65,26 @@ func convert(c *fiber.Ctx) error {
 		return errors.New(msg)
 	}

-	_, webpAbsPath := genWebpAbs(rawImageAbs, config.ExhaustPath, imgFilename, reqURI)
+	// generate with timestamp to make sure files are update-to-date
+	avifAbs, webpAbs := genOptimizedAbs(rawImageAbs, config.ExhaustPath, imgFilename, reqURI)
+	convertFilter(rawImageAbs, avifAbs, webpAbs, nil)

-	if imageExists(webpAbsPath) {
-		finalFile = webpAbsPath
-	} else {
-		// we don't have abc.jpg.png1582558990.webp
-		// delete the old pic and convert a new one.
-		// /home/webp_server/exhaust/path/to/tsuki.jpg.1582558990.webp
-		destHalfFile := path.Clean(path.Join(webpAbsPath, path.Dir(reqURI), imgFilename))
-		matches, err := filepath.Glob(destHalfFile + "*")
-		if err != nil {
-			log.Error(err.Error())
-		} else {
-			// /home/webp_server/exhaust/path/to/tsuki.jpg.1582558100.webp <- older ones will be removed
-			// /home/webp_server/exhaust/path/to/tsuki.jpg.1582558990.webp <- keep the latest one
-			for _, p := range matches {
-				if strings.Compare(destHalfFile, p) != 0 {
-					_ = os.Remove(p)
-				}
-			}
+	var availableFiles = []string{rawImageAbs}
+	for _, v := range goodFormat {
+		if "avif" == v {
+			availableFiles = append(availableFiles, avifAbs)
 		}
-
-		//for webp, we need to create dir first
-		err = os.MkdirAll(path.Dir(webpAbsPath), 0755)
-		q, _ := strconv.ParseFloat(config.Quality, 32)
-		err = webpEncoder(rawImageAbs, webpAbsPath, float32(q), true, nil)
-
-		if err != nil {
-			log.Error(err)
-			_ = c.SendStatus(400)
-			_ = c.Send([]byte("Bad file. " + err.Error()))
-			return err
+		if "webp" == v {
+			availableFiles = append(availableFiles, webpAbs)
 		}
-		finalFile = webpAbsPath
 	}
+
+	var finalFile = findSmallestFiles(availableFiles)
 	etag := genEtag(finalFile)
 	c.Set("ETag", etag)
-	c.Set("X-Compression-Rate", getCompressionRate(rawImageAbs, webpAbsPath))
-	finalFile = chooseLocalSmallerFile(rawImageAbs, webpAbsPath)
+	c.Set("X-Compression-Rate", getCompressionRate(rawImageAbs, finalFile))
+	buf, _ := ioutil.ReadFile(finalFile)
+	c.Set("content-type", getFileContentType(buf))
 	return c.SendFile(finalFile)

 }
@ -141,12 +106,8 @@ func proxyHandler(c *fiber.Ctx, reqURI string) error {
 			cleanProxyCache(config.ExhaustPath + reqURI + "*")
 			localRawImagePath := remoteRaw + reqURI
 			_ = fetchRemoteImage(localRawImagePath, realRemoteAddr)
-			q, _ := strconv.ParseFloat(config.Quality, 32)
 			_ = os.MkdirAll(path.Dir(localEtagWebPPath), 0755)
-			err := webpEncoder(localRawImagePath, localEtagWebPPath, float32(q), true, nil)
-			if err != nil {
-				log.Warning(err)
-			}
+			webpEncoder(localRawImagePath, localEtagWebPPath, config.Quality)
 			chooseProxy(remoteLength, localEtagWebPPath)
 			return c.SendFile(localEtagWebPPath)
 		}
--- a/router_test.go
+++ b/router_test.go
@ -15,8 +15,10 @@ import (
 )

 var (
-	chromeUA = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.183 Safari/537.36"
-	safariUA = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1 Safari/605.1.15"
+	chromeUA     = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.183 Safari/537.36"
+	acceptWebP   = "image/webp,image/apng,image/*,*/*;q=0.8"
+	acceptLegacy = "image/jpeg"
+	safariUA     = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1 Safari/605.1.15"
 )

 func setupParam() {
@ -29,10 +31,14 @@ func setupParam() {
 	remoteRaw = "remote-raw"
 }

-func requestToServer(url string, app *fiber.App, ua string) (*http.Response, []byte) {
+func requestToServer(url string, app *fiber.App, ua, accept string) (*http.Response, []byte) {
 	req := httptest.NewRequest("GET", url, nil)
 	req.Header.Set("User-Agent", ua)
-	resp, _ := app.Test(req, 60000)
+	req.Header.Set("Accept", accept)
+	resp, err := app.Test(req, 120000)
+	if err != nil {
+		return nil, nil
+	}
 	data, _ := ioutil.ReadAll(resp.Body)
 	return resp, data
 }
@ -44,7 +50,7 @@ func TestServerHeaders(t *testing.T) {
 	url := "http://127.0.0.1:3333/webp_server.bmp"

 	// test for chrome
-	response, _ := requestToServer(url, app, chromeUA)
+	response, _ := requestToServer(url, app, chromeUA, acceptWebP)
 	ratio := response.Header.Get("X-Compression-Rate")
 	etag := response.Header.Get("Etag")

@ -52,7 +58,7 @@ func TestServerHeaders(t *testing.T) {
 	assert.NotEqual(t, "", etag)

 	// test for safari
-	response, _ = requestToServer(url, app, safariUA)
+	response, _ = requestToServer(url, app, safariUA, acceptLegacy)
 	ratio = response.Header.Get("X-Compression-Rate")
 	etag = response.Header.Get("Etag")

@ -66,9 +72,9 @@ func TestConvert(t *testing.T) {
 		"http://127.0.0.1:3333/webp_server.jpg":                 "image/webp",
 		"http://127.0.0.1:3333/webp_server.bmp":                 "image/webp",
 		"http://127.0.0.1:3333/webp_server.png":                 "image/webp",
-		"http://127.0.0.1:3333/empty.jpg":                       "text/plain; charset=utf-8",
+		"http://127.0.0.1:3333/empty.jpg":                       "",
 		"http://127.0.0.1:3333/png.jpg":                         "image/webp",
-		"http://127.0.0.1:3333/12314.jpg":                       "text/plain; charset=utf-8",
+		"http://127.0.0.1:3333/12314.jpg":                       "",
 		"http://127.0.0.1:3333/dir1/inside.jpg":                 "image/webp",
 		"http://127.0.0.1:3333/%e5%a4%aa%e7%a5%9e%e5%95%a6.png": "image/webp",
 		"http://127.0.0.1:3333/太神啦.png":                         "image/webp",
@ -78,9 +84,9 @@ func TestConvert(t *testing.T) {
 		"http://127.0.0.1:3333/webp_server.jpg": "image/jpeg",
 		"http://127.0.0.1:3333/webp_server.bmp": "image/bmp",
 		"http://127.0.0.1:3333/webp_server.png": "image/png",
-		"http://127.0.0.1:3333/empty.jpg":       "text/plain; charset=utf-8",
+		"http://127.0.0.1:3333/empty.jpg":       "",
 		"http://127.0.0.1:3333/png.jpg":         "image/png",
-		"http://127.0.0.1:3333/12314.jpg":       "text/plain; charset=utf-8",
+		"http://127.0.0.1:3333/12314.jpg":       "",
 		"http://127.0.0.1:3333/dir1/inside.jpg": "image/jpeg",
 	}

@ -89,14 +95,14 @@ func TestConvert(t *testing.T) {

 	// test Chrome
 	for url, respType := range testChromeLink {
-		_, data := requestToServer(url, app, chromeUA)
+		_, data := requestToServer(url, app, chromeUA, acceptWebP)
 		contentType := getFileContentType(data)
 		assert.Equal(t, respType, contentType)
 	}

 	// test Safari
 	for url, respType := range testSafariLink {
-		_, data := requestToServer(url, app, safariUA)
+		_, data := requestToServer(url, app, safariUA, acceptLegacy)
 		contentType := getFileContentType(data)
 		assert.Equal(t, respType, contentType)
 	}
@ -112,13 +118,13 @@ func TestConvertNotAllowed(t *testing.T) {

 	// not allowed, but we have the file
 	url := "http://127.0.0.1:3333/webp_server.bmp"
-	_, data := requestToServer(url, app, chromeUA)
+	_, data := requestToServer(url, app, chromeUA, acceptWebP)
 	contentType := getFileContentType(data)
 	assert.Equal(t, "image/bmp", contentType)

 	// not allowed, random file
 	url = url + "hagdgd"
-	_, data = requestToServer(url, app, chromeUA)
+	_, data = requestToServer(url, app, chromeUA, acceptWebP)
 	assert.Contains(t, string(data), "File extension not allowed")

 }
@ -132,7 +138,7 @@ func TestConvertProxyModeBad(t *testing.T) {

 	// this is local random image, should be 500
 	url := "http://127.0.0.1:3333/webp_8888server.bmp"
-	resp, _ := requestToServer(url, app, chromeUA)
+	resp, _ := requestToServer(url, app, chromeUA, acceptWebP)
 	assert.Equal(t, http.StatusInternalServerError, resp.StatusCode)

 }
@ -147,29 +153,26 @@ func TestConvertProxyModeWork(t *testing.T) {
 	config.ImgPath = "https://webp.sh"
 	url := "https://webp.sh/images/cover.jpg"

-	resp, data := requestToServer(url, app, chromeUA)
+	resp, data := requestToServer(url, app, chromeUA, acceptWebP)
 	assert.Equal(t, http.StatusOK, resp.StatusCode)
 	assert.Equal(t, "image/webp", getFileContentType(data))

 	// test proxyMode with Safari
-	resp, data = requestToServer(url, app, safariUA)
+	resp, data = requestToServer(url, app, safariUA, acceptLegacy)
 	assert.Equal(t, http.StatusOK, resp.StatusCode)
 	assert.Equal(t, "image/jpeg", getFileContentType(data))
 }

 func TestConvertBigger(t *testing.T) {
 	setupParam()
-	config.Quality = "100"
-
-	jpg, _ := ioutil.ReadFile("pics/big.jpg")
+	config.Quality = 100

 	var app = fiber.New()
 	app.Get("/*", convert)

 	url := "http://127.0.0.1:3333/big.jpg"
-	response, data := requestToServer(url, app, chromeUA)
+	response, data := requestToServer(url, app, chromeUA, acceptWebP)
 	assert.Equal(t, "image/jpeg", response.Header.Get("content-type"))
-	assert.True(t, len(data) == len(jpg))
-
+	assert.Equal(t, "image/jpeg", getFileContentType(data))
 	_ = os.RemoveAll(config.ExhaustPath)
 }
--- a/update.go
+++ b/update.go
@ -3,13 +3,11 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	log "github.com/sirupsen/logrus"
+	"github.com/staktrace/go-update"
 	"io/ioutil"
 	"net/http"
-	"os"
-	"path"
 	"runtime"
-
-	log "github.com/sirupsen/logrus"
 )

 func autoUpdate() {
@ -47,12 +45,13 @@ func autoUpdate() {
 		log.Debugf("%s-%s not found on release.", runtime.GOOS, runtime.GOARCH)
 		return
 	}
-	data, _ := ioutil.ReadAll(resp.Body)
-	_ = os.Mkdir("update", 0755)
-	err := ioutil.WriteFile(path.Join("update", filename), data, 0755)

-	if err == nil {
-		log.Info("Update complete. Please find your binary from update directory.")
+	err := update.Apply(resp.Body, update.Options{})
+	if err != nil {
+		// error handling
+		log.Errorf("Update error. %v", err)
+	} else {
+		log.Info("Update complete. Please restart to apply changes.")
 	}
 	_ = resp.Body.Close()
 }
--- a/update_test.go
+++ b/update_test.go
@ -23,7 +23,7 @@ func Test404AutoUpdate(t *testing.T) {
 	dir := "./update"
 	releaseUrl = releaseUrl + "a"
 	autoUpdate()
-	assert.Equal(t, 0, fileCount(dir))
+	assert.Equal(t, int64(0), fileCount(dir))
 	_ = os.RemoveAll(dir)
 }

--- a/webp-server.go
+++ b/webp-server.go
@ -41,7 +41,7 @@ func deferInit() {
 		FullTimestamp:             true,
 		TimestampFormat:           "2006-01-02 15:04:05",
 		CallerPrettyfier: func(f *runtime.Frame) (string, string) {
-			return fmt.Sprintf("[%s()]", f.Function), ""
+			return fmt.Sprintf("[%d:%s()]", f.Line, f.Function), ""
 		},
 	}
 	log.SetFormatter(Formatter)
@ -99,7 +99,7 @@ Develop by WebP Server team. https://github.com/webp-sh`, version)
 	switchProxyMode()

 	if prefetch {
-		go prefetchImages(config.ImgPath, config.ExhaustPath, config.Quality)
+		go prefetchImages(config.ImgPath, config.ExhaustPath)
 	}

 	app := fiber.New(fiber.Config{
--- a/webp-server_test.go
+++ b/webp-server_test.go
@ -21,7 +21,7 @@ func TestLoadConfig(t *testing.T) {
 	assert.Equal(t, "./exhaust", c.ExhaustPath)
 	assert.Equal(t, "127.0.0.1", c.Host)
 	assert.Equal(t, "3333", c.Port)
-	assert.Equal(t, "80", c.Quality)
+	assert.Equal(t, float32(80), c.Quality)
 	assert.Equal(t, "./pics", c.ImgPath)
 	assert.Equal(t, []string{"jpg", "png", "jpeg", "bmp"}, c.AllowedTypes)
 }
@ -43,7 +43,7 @@ func TestMainFunction(t *testing.T) {

 	// run main function
 	go main()
-	time.Sleep(time.Second * 2)
+	time.Sleep(time.Second * 5)
 	// verbose, prefetch
 	assert.Equal(t, log.GetLevel(), log.DebugLevel)
 	assert.True(t, verboseMode)